Archimedes' Principle

Archimedes' principle states that any object fully or partially submerged in a fluid experiences an upward force equal to the weight of the fluid it displaces. This means that if you place an object in water, it pushes some water out of the way, and the water pushes back with a force that can make the object feel lighter. This principle explains why some objects float while others sink. For example, a heavy ship floats because its shape displaces enough water to create a buoyant force greater than its weight.